Adding status to swap complete

content/common/gpu/null_transport_surface.cc

Index: content/common/gpu/null_transport_surface.cc
diff --git a/content/common/gpu/null_transport_surface.cc b/content/common/gpu/null_transport_surface.cc
index ebcea853a675f95a1d5a736e5754eb21d334da86..33521a06d4c4965468afd69bce6aace448e28606 100644
--- a/content/common/gpu/null_transport_surface.cc
+++ b/content/common/gpu/null_transport_surface.cc
@@ -49,15 +49,17 @@ void NullTransportSurface::Destroy() {
   // Do not destroy |surface_| since we use the shared offscreen surface.
 }
 
-bool NullTransportSurface::SwapBuffers() {
+gfx::SwapResult NullTransportSurface::SwapBuffers() {
   NOTIMPLEMENTED();
-  return false;
+  return gfx::SwapResult::SWAP_FAILED;
 }
 
-bool NullTransportSurface::PostSubBuffer(
-    int x, int y, int width, int height) {
+gfx::SwapResult NullTransportSurface::PostSubBuffer(int x,
+                                                    int y,
+                                                    int width,
+                                                    int height) {
   NOTIMPLEMENTED();
-  return false;
+  return gfx::SwapResult::SWAP_FAILED;
 }
 
 void NullTransportSurface::SendVSyncUpdateIfAvailable() {